From 238cf89924fe33f03ceea5e4997d2ba0776530d3 Mon Sep 17 00:00:00 2001
From: "Eric S. Raymond" <esr@thyrsus.com>
Date: Wed, 6 Nov 1996 04:03:49 +0000
Subject: Back out the attempt to use stdio.

svn path=/trunk/; revision=488
---
 socket.c | 107 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++------
 1 file changed, 98 insertions(+), 9 deletions(-)

(limited to 'socket.c')

diff --git a/socket.c b/socket.c
index f759c216..ea0b5919 100644
--- a/socket.c
+++ b/socket.c
@@ -7,8 +7,10 @@
 #include <config.h>
 
 #include <stdio.h>
+#include <string.h>
 #include <sys/types.h>
 #include <sys/socket.h>
+#include <netinet/in.h>
 #include <arpa/inet.h>
 #include <netdb.h>
 #if defined(STDC_HEADERS)
@@ -17,6 +19,12 @@
 #if defined(HAVE_UNISTD_H)
 #include <unistd.h>
 #endif
+#if defined(HAVE_STDARG_H)
+#include <stdarg.h>
+#else
+#include <varargs.h>
+#endif
+#include "socket.h"
 
 #ifndef  INADDR_NONE
 #ifdef   INADDR_BROADCAST
@@ -26,9 +34,7 @@
 #endif
 #endif
 
-#define  INTERNAL_BUFSIZE	2048
-
-FILE *sockopen(host, clientPort)
+FILE *Socket(host, clientPort)
 char *host;
 int clientPort;
 {
@@ -36,8 +42,7 @@ int clientPort;
     unsigned long inaddr;
     struct sockaddr_in ad;
     struct hostent *hp;
-    FILE *sockfp;
-
+    
     memset(&ad, 0, sizeof(ad));
     ad.sin_family = AF_INET;
 
@@ -56,16 +61,100 @@ int clientPort;
     sock = socket(AF_INET, SOCK_STREAM, 0);
     if (sock < 0)
         return (FILE *)NULL;
-
     if (connect(sock, (struct sockaddr *) &ad, sizeof(ad)) < 0)
     {
 	close(sock);
         return (FILE *)NULL;
     }
+    return fdopen(sock, "r+");
+}
+
+
+#if defined(HAVE_STDARG_H)
+int SockPrintf(FILE *sockfp, char* format, ...)
+{
+#else
+int SockPrintf(sockfp,format,va_alist)
+FILE *sockfp;
+char *format;
+va_dcl {
+#endif
+
+    va_list ap;
+    char buf[8192];
+
+#if defined(HAVE_STDARG_H)
+    va_start(ap, format) ;
+#else
+    va_start(ap);
+#endif
+    vsprintf(buf, format, ap);
+    va_end(ap);
+    return SockWrite(buf, strlen(buf), sockfp);
+
+}
+
+/*
+ * FIXME: This needs to be recoded to use stdio, if that's possible.
+ *
+ * If you think these functions are too slow and inefficient, you're
+ * absolutely right.  I wish I could figure out what to do about it.
+ * The ancestral popclient used static buffering here to cut down on the
+ * number of read(2) calls, but we can't do that because we can have
+ * two or more sockets open at a time.
+ *
+ * The right thing to do would be to use stdio for internal per-socket
+ * buffering here (which is why Socket() returns a file pointer) but 
+ * this causes mysterious lossage.  In case someone ever finds a way
+ * around this, a note on Carl Harris's original implementation said:
+ *
+ * Size of buffer for internal buffering read function 
+ * don't increase beyond the maximum atomic read/write size for
+ * your sockets, or you'll take a potentially huge performance hit
+ *
+ * #define  INTERNAL_BUFSIZE	2048
+ *
+ */
+
+int SockWrite(buf,len,sockfp)
+char *buf;
+int len;
+FILE *sockfp;
+{
+    int n, wrlen = 0;
+    
+    while (len)
+    {
+        n = write(fileno(sockfp), buf, len);
+        if (n <= 0)
+            return -1;
+        len -= n;
+	wrlen += n;
+	buf += n;
+    }
+    return wrlen;
+}
 
-    sockfp = fdopen(sock, "r+");
-    setvbuf(sockfp, NULL, _IOLBF, INTERNAL_BUFSIZE);
-    return sockfp;
+int SockGets(buf, len, sockfp)
+char *buf;
+int len;
+FILE *sockfp;
+{
+    int rdlen = 0;
+
+    while (--len)
+    {
+        if (read(fileno(sockfp), buf, 1) != 1)
+            return -1;
+        else
+	    rdlen++;
+        if (*buf == '\n')
+            break;
+        if (*buf != '\r') /* remove all CRs */
+            buf++;
+    }
+    *buf = 0;
+    return rdlen;
 }
 
 /* socket.c ends here */
-- 
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